convert : support Qwen3.5/Qwen3.5 Moe NVFP4 and add input scales (#20505)

convert : support Qwen3.5/Qwen3.5 Moe NVFP4 and add input scales (#20505)

* convert : fix Qwen3.5 NVFP4 conversion

* Updated copilot concerns and rebased

* move into _LinearAttentionVReorderBase and simplify

* --flake

* new_name not needed

* Added input_scale to gguf

* Fixed input_scale addition as tensor

* Added input scale to loader and named _in_s

* Update convert_hf_to_gguf.py

Re-removed input_scale from aux cleanup

Co-authored-by: Sigbjørn Skjæret <redacted>
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Co-authored-by: Sigbjørn Skjæret <redacted>